苏州混凝土水泥制品研究院有限公司

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发布时间:2020-01-06 00:00:00
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杂志简介

主办单位: 苏州混凝土水泥制品研究院有限公司
中国混凝土与水泥制品协会
  • 主编 : 李建华
  • 常务副主编 : 王春蓉
  • 刊期 : 月刊
  • 电话 : 0512-68285716
  • E-mail : sccpitg@126.com
  • 国内统一刊号(CN) : 32-1173/TU
  • 国际标准刊号(ISSN) : 1000-4637
  • 邮发代号 : 28-80
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混凝土研究

挤出型3D打印混凝土力学性能研究进展
挤出型3D打印混凝土力学性能研究进展
  • 黎宝山,姚一鸣,鲁 聪
2021年第3期
摘要
引用本文
摘   要:介绍了3D打印混凝土的特点与前景,综述了挤出型工艺的3D打印混凝土的压、拉、折、剪基本力学性能以及增强措施。研究表明:打印层在喷嘴的挤压作用下密实度有所提高,但同时层间易形成薄弱界面,造成性能的各向异性,通过调整胶凝材料、掺入纤维、优化工艺、水浴养护、布筋等措施能有效改善。此外,提出了还需进一步研究的问题。 Abstract: The characteristics and developing trend of 3D printed concrete technique are introduced. The mechanical properties including compression, tension, bending, shear and reinforcement measures of the 3D printed concrete are reviewed. The researches show the compactness of 3D printing layer is improved under the extrusion effect of nozzle, but there are obvious weak interface between the layers, leading to a great anisotropy. However, it can be effectively improved by adjusting the material composition, optimizing the processing manner, adopting special cured methods and steel reinforcement. In addition, the problems required for further research are put forword.
黎宝山,姚一鸣,鲁聪.挤出型3D打印混凝土力学性能研究进展[J].混凝土与水泥制品,2021(3):1-6. LI B S, YAO Y M, LU C.Research Progress of Mechanical Properties for Extrusion-based 3D Printed Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):1-6.
g-C3N4光催化混凝土对NO降解性能研究
g-C3N4光催化混凝土对NO降解性能研究
  • 张瑜都1,孔文琼1,赵建昌2,张 晴3
2020年第3期
摘要
引用本文
摘   要:研究了不同制备工艺及掺量的石墨相氮化碳(g-C3N4)对混凝土的力学性能及对NO气体光催化降解性能的影响及变化规律。通过TEM、SEM、XRD分别对材料的物相及微观结构进行了表征,利用微机控制全自动压力试验机和氮氧化物分析仪分别研究了掺g-C3N4后混凝土的抗压强度及对NO的降解性能。结果表明,四种不同种类的g-C3N4掺入后混凝土都具有对NO的降解作用,其中,少层g-C3N4的降解率最高,且在紫外线等照射24 h后其仍能保持较高的降解率;g-C3N4掺量不超过0.8%时混凝土的抗压强度不会有太大影响,在此范围内尽可能提高g-C3N4的掺量来提高其对NO的降解作用。 Abstract: The effects of different preparation technology and amount of graphite phase carbon nitride (g-C3N4) on the mechanical properties of the concrete and photocatalytic degradation of NO gas were studied. The phase and microstructure of the materials were characterized by TEM, SEM and XRD. The compressive strength and NO degradation of the concrete with g-C3N4 were studied by means of a microcomputer controlled automatic pressure tester and a nitrogen oxide analyzer. The results show that four kinds of g-C3N4 added in concrete have obvious degradation effect on NO, among which the degradation rate of a few layers g-C3N4 is the highest, and it can still maintain a high degradation rate 24 h after UV irradiation. The compressive strength of concrete will not be greatly affected when the amount of g-C3N4 does not exceed 0.8%, and the adding g-C3N4 can be improved as much as possible in this range to improve the degradation of NO.  
张瑜都,孔文琼,赵建昌,等.7 g-C3N4光催化混凝土对NO降解性能研究[J].混凝土与水泥制品,2021(3):7-10. ZHANG Y D,KONG W Q,ZHAO J C,et al.Photocatalytic Concrete Loaded with g-C3N4 and Its Degradation Performance of NO[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):7-10.
TBM压注式超高性能混凝土试验研究
TBM压注式超高性能混凝土试验研究
  • 高玉军1,2,3,李亚隆4,毛锦波4,王文荣1,2,3
2021年第3期
摘要
引用本文
摘   要:针对天山胜利隧道TBM压注式超高性能混凝土(UHPC)的性能要求,基于紧密堆积理论,优化了混凝土中胶凝材料各组分的比例。通过掺入钢渣粉、纳米早强剂和塑性膨胀剂配制出了大流动度、超长保坍、超早强、低收缩的UHPC,并研究了胶凝材料体系紧密堆积孔隙率、钢纤维掺量、混凝土流动性三者之间的关系。结果表明:采用复合掺合料、钢渣粉优化胶凝体系、骨料体系可制备出工作性良好、各项性能指标均能满足要求的UHPC,初始流动度大于700 mm,4 h流动度经时损失小于5%,1 d拆模且抗压强度大于设计要求51.6 MPa,28 d干燥收缩仅为200×10-6。纳米早强剂的掺入不但保证了混凝土早期强度的增长,而且不影响混凝土流动性的长时间保持和后期强度的增长。 Abstract: According to the performance requirements of TBM pressure-pumping ultra high-performance concrete (UHPC) in Tianshan Shengli Tunnel, based on the compact packing theory, the proportion of each component of the cementitious material system in the concrete was optimized. The plastic expansion agent UHPC with high fluidity, ultra-long time slump retention, ultra-early strength and low shrinkage was prepared by adding steel slag powder, nano early strength agent. The relationship between the tightly packed porosity of the cementitious material system and the steel fiber content and concrete fluidity was researched. The results show that the use of compound admixtures, steel slag powder, aggregate system to optimize the cementing system materials can prepare UHPC with excellent working performance and all performance indexes can meet the requirements. The initial fluidity is greater than 700 mm and the 4 h fluidity loss is less than 5%, 1 d demolding and compressive strength is greater than the design requirements of 51.6 MPa, 28 d drying shrinkage is only 200×10-6. The incorporation of nano early strength agent not only guarantees the increase of the concrete’s ultra-early strength, but also has no effect on the concrete’s long-term retention of fluidity and the growth of its strength in the later period.
高玉军,李亚隆,毛锦波,等.TBM压注式超高性能混凝土试验研究[J].混凝土与水泥制品,2021(3):11-14,19. GAO Y J,LI Ya-long,MAO Jin-bo,et al.Experimental Research on TBM Pressure-pumping Ultra-high Performance Concrete (UHPC)[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):11-14,19.
基于损伤理论的硅藻土混凝土冻融损伤研究
基于损伤理论的硅藻土混凝土冻融损伤研究
  • 王艺程,郑一峰,秦 泳,于 泽
2021年第3期
摘要
引用本文
摘   要:通过快速冻融试验,对不同强度等级的掺硅藻土混凝土的抗冻性进行了分析。在损伤理论的基础上构建了多次冻融后混凝土劣化失效的数学模型,使用Matlab程序模拟了混凝土内部各单元点的损伤失效与时间的函数关系,并生成了混凝土的截面损伤概率图。在冻融循环时间相同的条件下对不同硅藻土掺量的混凝土进行了对比分析。结果表明:硅藻土的加入使混凝土的抗冻性能得到了提高;模型模拟的混凝土损伤过程符合冻融破坏的变化规律。 Abstract: Through the rapid freeze-thaw experiment, the frost resistance of diatomite mixed with concrete of different strength levels was systematically analyzed. Based on the damage theory, a mathematical model of concrete degradation and failure after multiple freeze-thaw cycles was constructed. The Matlab program was used to simulate the functional relationship between the damage failure and time of each unit point in the concrete material, and a cross-sectional damage probability map of concrete was generated. Under the condition of the same freeze-thaw cycle time, the concrete with different diatomite content was compared. The results show that the frost resistance of concrete is improved by adding diatomite. And using the damage model for performance analysis, the concrete damage process simulated by the model conforms to the change law of freeze-thaw damage.
王艺程,郑一峰,秦泳,等.基于损伤理论的硅藻土混凝土冻融损伤研究[J].混凝土与水泥制品,2021(3):15-19. WANG Y C,ZHENG Y F,QIN Y,et al.Study on Freeze-thaw Damage of Diatomite Concrete Based on the Damage Theory[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):15-19.
水下隧道工程清水混凝土外观砂斑的成因分析
水下隧道工程清水混凝土外观砂斑的成因分析
  • 姜 骞,于 诚
2021年第3期
摘要
引用本文
摘   要:为了研究清水混凝土外观砂斑的形成原因,对某水下隧道工程敞开段侧墙清水混凝土进行了质量调研与试验分析。结果表明:砂斑主要与混凝土用水量增加有关;原材料中粉煤灰品质的波动增加了混凝土用水量;为了在相同减水剂掺量下满足混凝土拌合物的流动性要求,大幅增加用水量造成混凝土中自由水过多,析出带走混凝土表面的胶凝材料颗粒,由此导致砂斑缺陷;针对缺陷的成因,从原材料品质控制、拌合生产、浇筑施工和及时养护等角度,提出了提升清水混凝土外观质量的建议。 Abstract: Aiming at a better understanding of cause of sand spots formation on fair-faced concrete for side wall in open section of some underwater tunnel, concrete construction quality on-site and experimental research within-laboratory were conducted. The results show that the concrete defect is found to be related to overuse of mixing water. To fulfill the workability of fresh concrete with same dosage of water reducer, water demand of concrete mixtures is increased for quality variation of fly ash. The excessive quantities of mixing water in the system lead to too much free water in paste. Binder particles on the surface of concrete are flushed away, and the sand spots appear. In addition, considering the cause of the defect, concrete surface quality promotion advices, including control of raw materials quality, pouring construction, and immediately curing, are put forward.
姜骞,于诚.水下隧道工程清水混凝土外观砂斑的成因分析[J].混凝土与水泥制品,2021(3):20-23,27. JIANG Q,YU C.Causes Analysis for Sand Spots on Fair-faced Concrete for Side Wall in Underwater Tunnel[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):20-23,27.
寒区隧道混凝土衬砌结构耐久性研究综述
寒区隧道混凝土衬砌结构耐久性研究综述
  • 韩少渊
2021年第3期
摘要
引用本文
韩少渊.寒区隧道混凝土衬砌结构耐久性研究综述[J].混凝土与水泥制品,2021(3):24-27. HAN S Y.Review on Durability of Tunnel Concrete Lining Structure in Cold Region[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):24-27.
粉煤灰、矿粉对水泥浆体变形性能的影响
粉煤灰、矿粉对水泥浆体变形性能的影响
  • 陈红星1,戴惠兰1,贾志强1,张守治2,刘建新2,徐 文3
2021年第3期
摘要
引用本文
摘   要:以高性能混凝土用胶凝材料为研究对象,研究了粉煤灰、矿粉在不同养护湿度和温度下对水泥浆体变形性能的影响规律。结果表明:饱水养护时,粉煤灰的掺入降低了水泥浆体的水养膨胀变形;养护温度升高、粉煤灰掺量增加,水泥浆体水养膨胀变形降低幅度增大,但不同水养温度下掺入矿粉对水泥浆体膨胀变形无明显影响;密封养护时,掺入粉煤灰可有效抑制水泥浆体的自收缩,但矿粉掺入会增大水泥浆体自收缩;干燥养护时,掺入粉煤灰对水泥浆体有一定的减缩作用,而矿粉的掺入会增大水泥浆体的干燥收缩。 Abstract: Taking the cement material for high performance concrete as the research object,the deformation of cement based materials containing fly ash and slag under different curing humidity and curing temperature was studied. Experimental results show that fly ash reduces expansion deformation of cement paste under saturated condition. When the curing temperature increases, the expansion deformation of the cement paste containing fly ash decreases. However, slag has no effect on the expansion deformation of cement paste whatever under different temperature. Fly ash can reduce the shrinkage of cement paste whatever under sealed condition or under dried condition, but the slag increases the self-shrinkage and drying shrinkage of the cement paste.
陈红星,戴惠兰,贾志强,等.粉煤灰、矿粉对水泥浆体变形性能的影响[J].混凝土与水泥制品,2021(3):28-31. CHEN H X,DAI H L,JIA Z Q,et al.Influence of Fly Ash and Slag on the Deformation Performance of Cement Paste[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):28-31.

水泥混凝土制品

预制装配式综合管廊模拟分析及结构优化设计
预制装配式综合管廊模拟分析及结构优化设计
  • 马 腾1,2,张兆强1,孟贵林3
2021年第3期
摘要
引用本文
摘   要:以绵阳市预制装配式综合管廊为研究对象,利用有限元软件,建立了三维实体模型,考虑了不同分片形式、连接方式、实际受荷情况,分析了其正常使用情况下的弯矩分布变化,并从舱室尺寸排布、增设腋角及改变顶板结构形式三个方面进行了优化设计。研究结果表明:该预制装配式综合管廊设计满足规范要求,但其结构存在进一步优化的空间;当三舱室等间距排布时结构受力相对更合理;增设腋角可明显改善端部应力集中现象;采用叠合式顶板可有效降低结构最大弯矩值。 Abstract: Taking the precast concrete utility tunnel in Mianyang as the research object, the finite element software ABAQUS was used to establish a three-dimensional solid model, and the form of the segment, the connection method, the actual load were condidered. The stress and the strain were analyzed, and optimized design was carried out from three aspects: cabin size arrangement, adding axillary legs and changing the roof structure. The research results show that the design of the precast concrete utility tunnel can meet the requirements of the specification, but need to be further optimized. When the three compartments are arranged at equal intervals, the structural stress is relatively more reasonable. The addition of axillary legs can significantly improve the stress concentration at the ends. Using a laminated roof can effectively increase the resistance of the roofs.
马腾,张兆强,孟贵林.预制装配式综合管廊模拟分析及结构优化设计[J].混凝土与水泥制品,2021(3):32-35,39. ZHANG Z Q,MENG G LMA T.Numerical Simulation Analysis and Structural Optimization of Precast Utility Tunnel[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):32-35,39.
复合式防腐路缘石的制备与失效机制模拟研究
复合式防腐路缘石的制备与失效机制模拟研究
  • 崔东霞1,付元坤2,惠 冰3,王 超1
2021年第3期
摘要
引用本文
摘   要:制备了一种复合式防腐路缘石,其内部为C40混凝土,外包裹层分别为环氧砂浆与自乳化砂浆,并建立了相应复合结构的数值模拟模型,研究了外包裹层对复合式路缘石强度和耐久性的影响,并模拟了内外层结构线膨胀系数对体系应力的影响。结果表明:与环氧砂浆相比,自乳化砂浆的抗压、抗折强度值较低,且在经受盐冻破坏后,其抗压、抗折强度下降幅度较大;环氧砂浆复合式路缘石在降温荷载作用下,除约束处外,路缘石截面突变处达到最大拉应力9.41 MPa,易开裂;自乳化砂浆复合式路缘石在降温荷载作用下的拉应力为2.99 MPa,未开裂;基于研究结果,提出了复合式路缘石结构尺寸的优化设计方案。 Abstract: Anti-corrosive composite curbs were prepared by using C40 concrete as interior structure, epoxy mortar and waterborne epoxy mortar as exterior coating individually, the finite element models were established to study the effects of the exterior coating on the strength and durability of the curbs. The results show that compared with with epoxy resin mortar, the compressive and flexural strength of self-emulsified mortar are lower, and the compressive and flexural strength decrease greatly after salt freezing. Under the cooling loads, the maximum tensile stress of epoxy mortar line composite curbs is 9.41 MPa at the abrupt change of curbs section, except for the constraint, which is easy to crack. The tensile stress of self emulsifying mortar line composite curbs under the cooling load is 2.99 MPa, which is not cracked. Based on the research results, the optimization suggestions for the structure of composite curbs are put forward.
崔东霞,付元坤,惠冰,等.复合式防腐路缘石的制备与失效机制模拟研究[J].混凝土与水泥制品,2021(3):36-39. CUI D X,FU Y K,HUI B,et al.Preparation and Failure Mechanism Simulation of Composite Anti-corrosion Curbs[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):36-39.
预制桩用套珠式连接器的研究与应用
预制桩用套珠式连接器的研究与应用
  • 邓剑涛1,袁 涛2,邓成河1
2021年第3期
摘要
引用本文
摘   要:为提高预应力混凝土管桩的连接质量和施工速度,研制了一种新型预应力混凝土管桩用套珠式连接器,阐述了其结构原理,并通过力学试验,验证了其力学性能满足相关标准要求。此外,结合工程应用,介绍了该连接器的安装和施工工序,具有安全可靠、连接快捷等优点。 Abstract: In order to improve the connection quality and construction speed of precast concrete piles, a new type of beaded connector for the concrete piles was developed, and the structure principle was described. The mechanical test results show that its mechanical properties can meet the requirements of relevant standards. In addition, combined with the engineering application, the installation and construction process of the connector are introduced and shows the advantages of safety, reliability and fast connection.
邓剑涛,袁涛,邓成河.预制桩用套珠式连接器的研究与应用[J].混凝土与水泥制品,2021(3):40-42. DENG J T,YUAN T,DENG C H.Research and Application on the Beaded Connector for the Precast Concrete Piles[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):40-42.

纤维水泥及制品

短切玄武岩纤维对磷酸镁水泥砂浆性能的影响
短切玄武岩纤维对磷酸镁水泥砂浆性能的影响
  • 赵鹏辉1, 党玉栋2,3,陈治君2,3,李昕成2,3,徐 清1,刘聪兴1,钱觉时4
2021年第3期
摘要
引用本文
摘   要:采用固定水胶比和固定流动度两种方案进行对比试验,研究了不同掺量的玄武岩纤维对复合磷酸镁水泥(MPC)砂浆流动度和力学性能的影响,并采用扫描电子显微镜(SEM)观察了微观形貌。结果表明:在固定水胶比的情况下,随着玄武岩纤维掺量的增加,MPC砂浆的流动度降低,但力学性能有所提高,且掺量为3.5 kg/m3时,力学性能最优,超过此掺量则增幅下降;在固定流动度而水胶比随纤维掺量增加而增大的情况下,MPC砂浆的力学性能整体呈下降趋势;SEM结果表明,在一定掺量范围内,玄武岩纤维在MPC砂浆中分散均匀,掺量过多则会产生纤维团聚现象;MPC砂浆与玄武岩纤维之间有一定的黏接力和摩擦力,但二者的黏结性或相容性不足;MPC砂浆的水化过程不会对玄武岩纤维造成损伤。 Abstract: The comparative tests were carried out with two schemes of fixed water-binder ratio and fixed fluidity, and the effect of different content of basalt fiber on the fluidity and mechanical properties of composite magnesium phosphate cement (MPC) mortar was studied, and the scanning electron microscope (SEM) was used to observe its microscopic appearance. The results show that under the condition of fixed water-binder ratio, the fluidity of MPC mortar decreases but its mechanical properties improve with the increase of basalt fiber content, and the mechanical properties are optimal when the content is 3.5 kg/m3, but the increase decreases when the content exceeds 3.5 kg/m3. When the fluidity is fixed and the water-binder ratio increases with the increase of fiber content, the overall mechanical properties of MPC mortar tend to decline. The SEM results show that within a certain content range, basalt fiber is evenly dispersed in MPC mortar, while over-mixing will produce fiber cluster phenomenon. MPC mortar and basalt fiber have certain adhesion and friction force, but the adhesion or compatibility is insufficient. The hydration process of MPC mortar will not cause damage to basalt fiber.
赵鹏辉,党玉栋,陈治君,等.短切玄武岩纤维对磷酸镁水泥砂浆性能的影响[J].混凝土与水泥制品,2021(3):43-47. ZHAO P H,DANG Y D,CHEN Z J,et al.Effect of Chopped Basalt Fiber on the Properties of Magnesium Phosphate Cement Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):43-47.
耐碱玻纤改善高性能混凝土抗裂性能研究
耐碱玻纤改善高性能混凝土抗裂性能研究
  • 王 威1,宿利平1,姜瑞双2,3
2021年第3期
摘要
引用本文
王威,宿利平,姜瑞双.耐碱玻纤改善高性能混凝土抗裂性能研究[J].混凝土与水泥制品,2021(3):48-51. WANG W,SU L P,JIANG R S.Study on Cracking Resistance of Glass Fiber Reinforced High Performance Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):48-51.
碳纳米管与钢纤维对混凝土抗压强度与抗冲击性能的影响
碳纳米管与钢纤维对混凝土抗压强度与抗冲击性能的影响
  • 尹 鹏,孙 敏,董子硕
2021年第3期
摘要
引用本文
摘   要:研究了碳纳米管、钢纤维、碳纳米管+钢纤维对混凝土抗压强度和抗冲击性能的影响。结果表明:掺入碳纳米管和钢纤维均能提高混凝土的抗压强度;单掺钢纤维较单掺碳纳米管对混凝土抗冲击性能的提升效果更大;混掺碳纳米管与钢纤维混凝土的韧性和延性较单掺钢纤维混凝土得到再次提升;复掺1%钢纤维+0.30%碳纳米管对混凝土性能的增强效果最显著。 Abstract: The effects of carbon nanotubes, steel fibers, carbon nanotubes + steel fibers on the compressive strength and impact resistance of concrete were studied. The results show that the addition of carbon nanotubes and steel fibers can improve the compressive strength of concrete. Single-doped steel fiber has a greater effect on the impact resistance of concrete than that of single-doped carbon nanotubes. The toughness and ductility of concrete mixed with carbon nanotubes and steel fiber are improved compared with single-doped steel fiber concrete. Adding 1% steel fiber + 0.30% carbon nanotubes has the best reinforcement effect on concrete performance.
尹鹏,孙敏,董子硕.碳纳米管与钢纤维对混凝土抗压强度与抗冲击性能的影响[J].混凝土与水泥制品,2021(3):52-55. YIN P,SUN M,DONG Z S.Influence of Carbon Nanotubes and Steel Fibers on the Compressive Strength and Impact Resistance of Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):52-55.
PVA纤维天然浮石混凝土动态力学性能研究
PVA纤维天然浮石混凝土动态力学性能研究
  • 霍俊芳1,2,奇雨欣1,王萧萧1,2,曹 雪1,李海青1
2021年第3期
摘要
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摘   要:以内蒙古地区的天然浮石为粗骨料配制天然浮石混凝土,采用?覫100分离式霍普金森压杆(SHPB)试验分析了不同聚乙烯醇(PVA)纤维体积掺量(0、0.15%、0.30%)天然浮石混凝土在冲击荷载下的动态力学性能。结果表明:随着PVA纤维掺量的增加,天然浮石混凝土的静态抗压强度增强,动态冲击压缩下破坏程度减弱;当应变率低于96 s-1时,0.30% PVA纤维天然浮石混凝土的动态抗压强度最佳;当应变率高于127 s-1时,0.30%PVA纤维天然浮石混凝土吸收的能量最多,相比于未掺纤维的天然浮石混凝土提高了11.0%。 Abstract: Natural pumice concrete was prepared from natural pumice stone as coarse aggregate from Inner Mongolia, The dynamic mechanical properties of natural pumice concrete with different PVA fiber volume contents (0, 0.15%, 0.30%) under impact loads were analyzed by using ?覫100 split hopkinson pressure bar(SHPB). The results show that with the increases of PVA fiber content, the static compressive strength increases, and the damage degree of the natural pumice concrete decreases. When the strain rate is lower than 96 s-1, 0.30%PVA fiber natural pumice concrete has the best dynamic compressive strength. When the strain rate is higher than 127 s-1, 0.30%PVA fiber natural pumice concrete absorbs the most energy, which is 11.0% higher than that of the natural pumice concrete without fiber.
霍俊芳,奇雨欣,王萧萧,等.PVA纤维天然浮石混凝土动态力学性能研究[J].混凝土与水泥制品,2021(3):56-61. HUO J F,QI Y X,WANG X X,et al.Study of Dynamic Mechanical Properties of PVA Fiber Natural Pumice Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):56-61.
PVA纤维对水泥胶砂抗侵蚀性能的影响
PVA纤维对水泥胶砂抗侵蚀性能的影响
  • 赵 杨,孙海燕,龚爱民,王福来,陈 晨,梅 伟
2021年第3期
摘要
引用本文
摘   要:研究了不同掺量PVA纤维水泥胶砂经浓度为10 000 mg/L和30 000 mg/L的硫酸钠溶液侵蚀后的抗压强度和抗折强度变化规律,并以抗折抗蚀系数为指标评价了碱环境下PVA纤维对水泥胶砂抗侵蚀性能的影响。结果表明:随PVA纤维体积掺量的增加,水泥胶砂拌和物的流动度逐渐减小;经硫酸钠溶液侵蚀后,各组试件的力学性能和抗折抗蚀系数均有不同程度降低,高浓度和长侵蚀龄期对水泥胶砂的抗侵蚀性能影响较显著;对比基准组,掺入PVA纤维可有效提高水泥胶砂的力学性能和抗折抗蚀系数,且PVA纤维体积掺量为0.2%时效果最好。 Abstract: The changes of compressive strength and flexural strength of different amounts of PVA fiber cement mortar after being eroded by sodium sulfate solutions with concentrations of 10 000 mg/L and 30 000 mg/L were studied, and the flexural resistance coefficient was taken as an indicator to evaluate the influence of PVA fiber on the corrosion resistance of cement mortar under alkaline environment. The results show that the fluidity of cement mortar mixture decreases gradually with increasing PVA fiber volume dosages. The mechanical properties and flexural resistance coefficient of the specimen are reduced to different degrees after being eroded by sodium sulfate solution. High concentration and long erosion age have a significant impact on the flexural resistance coefficient of cement mortar. Compared with the reference group, the addition of PVA fiber can effectively improve the mechanical properties and flexural resistance coefficient of cement mortar, and the optimal volume dosage of PVA fiber is 0.2%.
赵杨,孙海燕,龚爱民,等.PVA纤维对水泥胶砂抗侵蚀性能的影响[J].混凝土与水泥制品,2021(3):62-65. ZHAO Y,SUN H Y,GONG A M,et al.Effect of PVA Fiber on the Erosion Resistance of Cement Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):62-65.

房建材料及制品

预应力混凝土钢管桁架叠合板的研究与应用
预应力混凝土钢管桁架叠合板的研究与应用
  • 郭 健1,吉 成2,金如元1,董嘉林1
2021年第3期
摘要
引用本文
摘   要:预应力混凝土钢管桁架叠合板是一种新型叠合板,具有质量轻、承载能力强、抗裂性能好以及生产效率高等优点。以江苏省企业标准设计图集《预应力混凝土钢管桁架叠合板》的编制为背景,介绍了该产品的计算、构造相关规定及生产、制作相关要求,分析了该产品的特点,并提出了下一步研究方向。 Abstract: Prestressed concrete composite slab with grouted steel pipe trusses is a new type of composite plate, which has the advantages of light weight, strong bearing capacity, good crack resistance and high production efficiency. Based on the compilation of Jiangsu Province enterprise standard design atlas Prestressed Concrete Composite Slab with Grouted Steel Pipetrusses, the calculation, construction and production requirements of the product are introduced, the characteristics of the product is analyzed, and the next research direction is put forward.
郭健,吉成,金如元,等.预应力混凝土钢管桁架叠合板的研究与应用[J].混凝土与水泥制品,2021(3):66-68,75. GUO J,JI C,JIN R Y,et al.Research and Application of Prestressed Concrete Composite Slabs with Grouted Steel Pipe Trusses[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):66-68,75.
地铁车站叠合式墙板收缩裂缝控制技术 研究进展
地铁车站叠合式墙板收缩裂缝控制技术 研究进展
  • 刘 毅1,潘 清1,张明亮2,刘家彬2,庞超明3,秦鸿根3
2021年第3期
摘要
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摘   要:整体装配式地下车站叠合式墙板存在大面积预制混凝土板与现浇混凝土如何有机结合、解决现浇混凝土裂缝和墙体渗漏的问题,这与传统现浇混凝土施工工艺存在较大差异,其具体实施过程中将面临很多新的结构、材料和施工技术方面的问题。针对某城市轨道交通地铁车站建设的需要,基于现有大面积混凝土收缩裂缝和新老混凝土约束裂缝现状和控制技术研究成果,从结构设计、混凝土材料、施工技术三方面,探讨并提出了地下车站整体装配式叠合墙板裂缝控制的有效措施。 Abstract: The integrally assembled underground station laminated wall panel has the problems of how to organically combine the large area of precast concrete slab and cast-in-place concrete, and how to solve the problems of cast-in-place concrete cracks and wall leakage, which is different from the traditional cast-in-place concrete construction process. During its specific implementation process, it will face many new structural, material and construction technology issues. In view of the needs of the construction of a certain urban rail transit subway station, based on the existing large-area concrete shrinkage cracks and the new and old concrete restraint cracks status and control technology research results, from the three aspects of structural design, concrete materials, construction technology, the underground stations effective measures for crack control of integrally assembled laminated wall panels are discussed and put forward.
刘毅,潘清,张明亮,等.地铁车站叠合式墙板收缩裂缝控制技术研究进展[J].混凝土与水泥制品,2021(3):69-75. LIU Y,PAN Q,ZHANG M L,et al.Research Progress of Shrinkage Crack Control Technology of Laminated Wall Panel in Subway Station[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):69-75.
粮食侧压力作用下密肋复合墙板肋格单元数值模拟
粮食侧压力作用下密肋复合墙板肋格单元数值模拟
  • 丁永刚,王浩然,赵金全,刘 强,许启铿
2021年第3期
摘要
引用本文
摘   要:在已有试验基础上,进行了基于内聚力模型的密肋复合墙板静力加载全过程有限元分析,研究了密肋复合墙板结构在粮食侧压力作用下的受力机理。结果表明:黏结界面开裂后,基于内聚力模型的密肋复合墙板在协同受力作用下表现出“拱”破坏形式;黏结界面损伤主要分布在跨中板底及板顶与边肋梁、柱接触区域,损伤及位移模拟结果与试验结果一致;基于内聚力模型的密肋复合墙板具有与矩形双向板相似的塑性铰线破坏特征,验证了内聚力模型的合理性,为粮食平房仓密肋复合墙板的结构计算分析提供了参考。 Abstract: On the basis of the existing tests, the finite element analysis of the whole process of static loading of multi-ribbed composite wall was carried out based on the cohesion model, and the mechanical mechanism and the finite element calculation method of multi-ribbed composite wall structure under the lateral pressure of grain were studied. The results show that after the interface cracks, the ribbed composite wall based on cohesion model shows “arch” failure mode under the synergistic force. The damage of the bond interface is mainly distributed in the area between the bottom and top of the mid-span plate with the side rib-beam and rib-column. Based on the cohesive model, the multi-ribbed composite wall has similar failure characteristics of yield line to the rectangular two-way plate, which verifies the rationality of the cohesive model,  and provides a reference for the calculation and analysis of the multi-ribbed composite wall board structure in storehouse.
丁永刚,王浩然,赵金全,等.粮食侧压力作用下密肋复合墙板肋格单元数值模拟[J].混凝土与水泥制品,2021(3):76-81. DING Y G,WANG H R,ZHAO J Q,et al.Numerical Simulation of Multi-ribbed Composite Wall Cells Under Lateral Pressure of Grain[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):76-81.
爆炸冲击载荷下钢板-混凝土组合结构的动态性能和破坏机理研究进展
爆炸冲击载荷下钢板-混凝土组合结构的动态性能和破坏机理研究进展
  • 秦彦帅1,曲艳东1,2,李继野2,张瑞雪1,于 跃1
2021年第3期
摘要
引用本文
秦彦帅,曲艳东,李继野,等.爆炸冲击载荷下钢板-混凝土组合结构的动态性能和破坏机理研究进展[J].混凝土与水泥制品,2021(3):82-87. QIN Y S,QU Y D,LI Ji-ye,et al.Research Progress on Dynamic Performances of Steel Plate-concrete Composite Structures Under Blast Loads[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):82-87.
不同截面形式高强混凝土剪力墙抗震性能研究
不同截面形式高强混凝土剪力墙抗震性能研究
  • 马 芸1,杨鹏辉2
2021年第3期
摘要
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马芸,杨鹏辉.不同截面形式高强混凝土剪力墙抗震性能研究[J].混凝土与水泥制品,2021(3):88-92. MA Y,YANG P H.Study on the Seismic Performance of High Strength Concrete Shear Walls With Different Cross Sections[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):88-92.

检测及试验方法研究

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节能与环保

再生细骨料干混砂浆力学性能试验研究
再生细骨料干混砂浆力学性能试验研究
  • 高 琦1,2,3,肖建庄1,赵艳娜2,3,王浩通2,3,王 媛2,3
2021年第3期
摘要
引用本文
摘   要:利用含红砖的再生细骨料100%替代天然砂,制备生态干混砂浆,研究了用水量、再生粉料掺量和外加剂掺量对干混砂浆力学性能的影响。结果表明:当再生粉料和外加剂掺量不变时,砂浆强度随着用水量的增大而降低,但56 d强度增长率反而增大;当再生粉料掺量和用水量不变时,外加剂掺量的增加对砂浆各龄期的强度均有负面影响;当外加剂掺量和用水量不变时,再生粉料掺量为20%时,对应的砂浆强度最大,低于或高于此掺量均会使砂浆强度降低;含红砖再生细骨料干混砂浆的后期强度(56 d)仍有较大提升空间。 Abstract: The dry mixed mortar was prepared with 100% recycled fine aggregate containing crushed red brick instead of natural sand. The effects of different water addition, recycled powder content and admixture content on the mechanical properties of dry mixed mortar were studied. The results show that when the recycled powder content and admixture content are constant, the strength of the mortar decreases with the increase of water addition, while the growth rate of 56 d strength increases. When the recycled powder content and the water addition remain unchanged, the increase of admixture content has a negative impact on the strength of the mortar at all ages. When the admixture content and the water addition remain unchanged, the mortar with 20% recycled powder has the highest strength, and the strength of the mortar is reduced when the content is lower or higher than 20%. There is still a large increase space in the late strength (56 d) of dry mixed mortar with red brick recycled fine aggregate.
高琦,肖建庄,赵艳娜,等.再生细骨料干混砂浆力学性能试验研究[J].混凝土与水泥制品,2021(3):93-96. GAO Q,XIAO J Z,ZHAO YN,et al.Experimental Study on Mechanical Properties of Dry Mixed Mortar with Recycled Fine Aggregate[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):93-96.
预包浆再生骨料自密实混凝土力学与抗氯离子渗透性研究
预包浆再生骨料自密实混凝土力学与抗氯离子渗透性研究
  • 金宝宏,宋牧原,谢 鑫,曹鑫铖
2021年第3期
摘要
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摘   要:研究了再生粗骨料替代率和骨料包浆对自密实再生混凝土力学性能和抗氯离子渗透性的影响。结果表明:当再生粗骨料替代率分别为30%、60%、100%时,与未包浆再生骨料混凝土相比,预包浆再生骨料混凝土的坍落扩展度分别提高了0.76%、3.33%、5.17%,抗压强度分别提高了5.9%、3.2%、6.1%,劈裂抗拉强度分别提高了5.2%、11.2%、18.2%;随着再生粗骨料替代率的增加,混凝土的电通量值增大,当再生粗骨料替代率分别为30%、60%、100%时,与未包浆再生骨料混凝土相比,预包浆再生骨料混凝土的电通量值分别下降了16.7%、22.9%、8.6%;骨料经过包浆处理后,改善了自密实再生混凝土的力学性能及抗氯离子渗透性。 Abstract: The effects of recycled coarse aggregate replacement rate and aggregate grouting on the mechanical properties and resistance to chloride ion permeability of self-compact recycled concrete were studied. The results show that when the replacement rates of recycled coarse aggregate are 30%, 60% and 100%, compared with the ungrouted concrete, the slump-flow expansion of the grouted concrete are increased respectively by 0.76%, 3.33% and 5.17%, the compressive strength of the grouted concrete are increased respectively by 5.9%, 3.2% and 6.1%, the split tensile strength of the grouted concrete are increased respectively by 5.2%, 11.2% and 18.2%. With the increase of replacement rate of recycled coarse aggregate, the concrete electric flux value increases. When the replacement rates of recycled coarse aggregate are 30%, 60% and 100%, the electric flux values of the grouted recycled concrete decrease respectively by 16.7%, 22.9% and 8.6% compared with ungrouted concrete. The mechanical properties and resistance to chloride ion permeability of the self-compacting recycled concrete are improved after the aggregates are grouted.
金宝宏,宋牧原,谢鑫,等.预包浆再生骨料自密实混凝土力学与抗氯离子渗透性研究[J].混凝土与水泥制品,2021(3):97-100. JIN B H,SONG M Y,XIE X,et al.Study on Mechanical Properties and Resistance to Chloride Ion Permeability of Self-compacting Concrete with Pre-grouted Recycled Aggregate[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):97-100.
纳米SiO2对掺污泥焚烧灰水泥胶砂性能的影响
纳米SiO2对掺污泥焚烧灰水泥胶砂性能的影响
  • 汪洪菊
2021年第3期
摘要
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摘   要:研究了纳米SiO2对污泥焚烧灰-水泥复合胶凝体系性能的影响,并对其水化程度进行了分析。结果表明:随着污泥焚烧灰掺量的增加,复合胶凝体系的标准稠度用水量增加、凝结时间延长,水泥胶砂流动度降低、抗压和抗折强度降低;纳米SiO2的掺入在一定程度上缩短了复合胶凝体系的凝结时间,提高了水泥胶砂的强度,但对工作性不利;掺入纳米SiO2后,复合胶凝体系7 d内的化学结合水生成量和生成速率较高,纳米SiO2对复合胶凝体系早期水化影响较大。 Abstract: The influence of nano-SiO2 on the performance of sludge incineration ash-cement composite cementitious system was studied, and its hydration degree was analyzed. The results show that with the increase of sludge incineration ash content, the standard consistency water requirement of the composite cementitious system increases, the setting time is prolonged, the fluidity of the cement mortar decreases, and the compressive and flexural strengths decrease. The incorporation of nano-SiO2 shortens the setting time of the composite cementitious system to a certain extent and improves the strength of cement mortar, but it is not good for workability. After adding nano-SiO2, the amount of chemically bound water and the rate of formation within 7 days of the composite cementitious system are higher, which shows that nano-SiO2 has a great influence on the early hydration of the composite cementitious system.
汪洪菊.纳米SiO2对掺污泥焚烧灰水泥胶砂性能的影响[J].混凝土与水泥制品,2021(3):101-104. WANG H J.Effect of Nano SiO2 on Performance of Cement Mortar with Sludge Incineration Ash[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):101-104.

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珊瑚碎屑混凝土的强度特性及破坏形态分析
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2015年第1期
摘要
引用本文
摘   要:针对目前对珊瑚碎屑混凝土的力学机理尚不清晰这一问题,对不同龄期和水灰比的珊瑚混凝土试块进行了试验研究。试验结果表明,珊瑚混凝土具有早强、快硬的特点;同时,当水灰比减小到一定程度后,单纯减小水灰比并不能明显提高珊瑚混凝土的抗压强度。本文从材料特性、界面特性以及龄期和水灰比等方面着手,对珊瑚混凝土的强度特性作了详细分析,并介绍了珊瑚混凝土的破坏形态,从而可为珊瑚碎屑应用于海岛混凝土工程提供一定的参考依据。 Abstract: Currently, the mechanical mechanism of coral debris concrete is not well understood, so the research on coral concrete test block in different age and water cement ratio is carried out. The test results show that coral concrete has the characteristics of fast strengthening and hardening, and when the water cement ratio decreases to a certain extent, simply reducing the water cement ratio could not result in obvious additions of compressive strength of coral concrete. From the aspects of material properties, interface properties,age and water cement ratio, the strength characteristics of the coral concrete are analyzed in detail, and the failure pattern is introduced, which can provide reference for application of coral debris in island concrete engineering.
王磊,范蕾. 珊瑚碎屑混凝土的强度特性及破坏形态分析[J].混凝土与水泥制品,2015(1):1-4. WANG L,FAN L.Strength Characteristic and Failure Pattern Analysis on Coral Debris Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(1):1-4.
装配式结构用高强套筒灌浆料性能试验研究
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  • 汪秀石,杨智良,吴照学
2015年第2期
摘要
引用本文
摘   要:研究了装配式结构用高强套筒灌浆料的性能,通过试配并进行了流动度、强度和膨胀性试验,优选出了优化配合比。同时基于优化配合比进行了水胶比、减水剂掺量和膨胀剂掺量对高强套筒灌浆料性能影响的研究。试验结果表明,随着水胶比(W/B)增加,流动度逐渐增大,但强度随W/B增加呈现明显降低趋势;减水剂可有效改善流动度,而当掺量过多时对强度有一定的影响;膨胀率随膨胀剂掺量增加呈现增长趋势,但当掺量小于8.0%时,膨胀效果较差,掺量大于12.0%时,对流动度和强度产生不利影响。 Abstract: The properties of high-strong cementitious grout for prefabricated concrete structure are studied, and the optimum mix proportion is elected by the tests of fluidity, strength and expansibility. The roles of W/B and the content of superplasticizer or expanders in high-strong cementitious grout for coupler are researched respectively based on the optimum mix proportion. The test results show that the fluidity of the grout increases with the increasing of W/B, but its strength has significantly decreasing trend; the fluidity of the grout can be improved effectively by superplasticizer, but its strength will decrease if superplasticizer content is excessive; expansion rate of the grout increases with the increasing of expanders agent content, but the expansibility is poor when the content is less than 8.0%, and it has an adversely affect on the liquidity and strength of the grout when the content is greater than 12.0%.
汪秀石,杨智良,吴照学.装配式结构用高强套筒灌浆料性能试验研究[J].混凝土与水泥制品,,2015(2):65-68. WANG X S,YANG Z L,WU Z X.Experimental Research on Performance of High-strong Cementitious Grouting for Prefabricated Concrete Structure[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(2):65-68.
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再生粗骨料强化处理工艺对再生混凝土性能的影响
  • 郭远新,李秋义,孔 哲,岳公冰,韩 帅
2015年第6期
摘要
引用本文
摘   要:分别采用物理强化、化学强化和物理-化学复合强化三种不同的强化方式对简单破碎再生粗骨料进行强化处理,并采用100%取代天然碎石制备再生粗骨料混凝土,研究了不同强化处理后的再生粗骨料对混凝土工作性能、力学性能、抗渗透性能和抗碳化性能的影响。结果表明,经过强化处理的再生粗骨料混凝土的各项性能均有不同程度的提高,其中经二次物理强化处理后的再生粗骨料混凝土的用水量较天然碎石混凝土仅增加了6kg/m3,其抗压强度也达到最高值,接近于天然碎石混凝土;经二次物理强化和化学浸渍复合强化处理后的再生混凝土氯离子扩散系数降低了13.6%;三种不同的强化方式处理后,再生混凝土的碳化深度和碳化速度均有所降低。 Abstract: Three kinds of different strengthening technologies of physical enhancement, chemical enhancement and physical-chemical compound enhancement to strengthen the simple crushing recycled coarse aggregate are adopted, with 100% replaced natural gravel preparation of recycled coarse aggregate concrete, and the influences of the recycled coarse aggregate of different strengthening treatment on the working performance, mechanical properties, penetration resistance and carbonation resistance of concrete are studied. The research results show that, through strengthening treatment, recycled coarse aggregate concrete properties are improved to different degrees, the water consumption of recycled coarse aggregate concrete after the secondary physical strengthen treatment is only increased by 6kg/m3 than that of natural gravel concrete. The compressive strength also reached the highest value, close to the natural gravel concrete. The chloride ion diffusion coefficient of recycled concrete after the secondary physical-chemical compound strengthening treatment is reduced by 13.6%. The depth of carbonation and carbonation velocity decrease after three kinds of different strengthening treatments.
郭远新,李秋义,孔哲,等.再生粗骨料强化处理工艺对再生混凝土性能的影响[J].混凝土与水泥制品,2015(6):11-17. GUO Y X,LI Q Y,KONG Z,et al.Influence of Strengthening Treatment Technology of Recycled Coarse Aggregate on Performance of Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(6):11-17.
无砂再生透水混凝土配合比设计
无砂再生透水混凝土配合比设计
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2016年第12期
摘要
引用本文
张松涛,贾欣悦,宋卓,等.无砂再生透水混凝土配合比设计[J].混凝土与水泥制品,2016(12):6-12. ZHANG S T,JIA X Y,SONG Z,et al.Design on Mix Proportion of No-fines Pervious Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(12):6-12.
清水混凝土概念、研究现状、存在问题及配合比设计方 综述
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2016年第10期
摘要
引用本文
摘   要:20世纪90年代后期以来,清水混凝土研究及工程应用得到了长足发展,许多城市建成了清水混凝土标志性工程。为了更好地促进清水混凝土研究的深入、工程质量的提高,对清水混凝土的概念、研究现状、存在问题及现有的清水混凝土配合比设计方法进行了系统地梳理、总结。通过对清水混凝土现状的研究,可使相关领域技术人员认识到清水混凝土发展中存在的不足、明确清水混凝土的研究方向,以实现清水混凝土技术研究水平的再提高,有力地支持清水混凝土工程应用的进一步推广。 Abstract: Since the late 1990s, research and application of fair-faced concrete has made considerable progress, many cities built landmark projects of fair-faced concrete. In order to better promote the study in-depth and the engineering quality improvement of fair-faced concrete, the concept, research status, existing problems and mixture design methods of fair-faced concrete are systematically reviewed and summarized. Through the above study of fair-faced concrete, the relevant technicians recognize the lack of fair-faced concrete in the development and realize a clear research direction, in order to improve research level, strongly support further promotion of fair-faced concrete in engineering applications.
郭伟,路林海,王龙志,等.清水混凝土概念、研究现状、存在问题及配合比设计方法综述[J].混凝土与水泥制品,2016(10):23-27. GUO W,LU L H,WANG L Z,et al.Summary for Concept, Research Status, Existing Problems and Mix Proportion Design of Fair-faced Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(10):23-27.
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新型装配式建筑构件生产及其施工技术的研究与应用
  • 范 玉1,4,徐 华2,黄 新3,黄继战4,马北京4
2015年第12期
摘要
引用本文
摘   要:通过对建筑PC构件的设计、生产、施工进行的研究,对建筑PC构件进行了再设计及优化,确定了合理的PC构件生产及其施工工艺方案,并对影响PC构件质量的相关因素进行了分析。 Abstract: Through the research on design of PC component, production and construction,  construction PC component is carried out for re-design and optimization. The reasonable PC component production and construction technology program are determined, and factors affecting the quality of PC are analyzed.
范玉,徐华,黄新,等.新型装配式建筑构件生产及其施工技术的研究与应用[J].混凝土与水泥制品,2015(12):87-89. FAN Y, XU H,HUANG X,et al.Research and Application of Production for New Type of Prefabricated Construction Component and Its Construction Technology[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):87-89.
石墨烯纳米片对水泥基复合材料力学性能的影响
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  • 王 辉,刘爱红,李 航
2015年第12期
摘要
引用本文
摘   要:采用球磨法将石墨烯纳米片分散在水泥基体中,研究了石墨烯纳米片掺量对水泥基材料抗折强度和抗压强度的影响。实验结果表明,适量的石墨烯纳米片可均匀分散在水泥基体中,通过桥联效应和拔出效应对水泥基材料起增强增韧作用,当石墨烯纳米片掺量为0.04%时,石墨烯纳米片与水泥基体界面结合良好,没有明显过渡层,试件3d抗折强度和抗压强度分别提高了22.84%和23.61%。 Abstract: Graphene nanoplatelets (GNPs) were dispersed in the cement matrix by milling method. The effect of GNPs with different contents on the flexural strength and compressive strength of composites were studied. The results showed that well dispersed GNPs improved the mechanical properties of cement composites, owing to GNPs excellent pulling-out and bridging capability. When the GNPs content was 0.04%, the mechanical properties of cement composites were increased obviously. Its flexural and compressive strength increased by 22.84% and 23.61% respectively compared with the referee sample after curing 3 days. The interface between graphene nanoplatelets and cement was bonded well, with no obvious transition layer.
王辉,刘爱红,李航.石墨烯纳米片对水泥基复合材料力学性能的影响[J].混凝土与水泥制品,2015(12):25-27. WANG H,LIU A H,LI H.Influence of Graphene Nanoplatelets on Mechanical Properties of Cement-based Composites[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):25-27.
大型智能PC构件自动化生产线简介
大型智能PC构件自动化生产线简介
  • 孙 红1,孙 健1,吴玉厚1,赵凯军2
2015年第3期
摘要
引用本文
摘   要:根据混凝土工厂化生产的需要,阐述了大型智能PC构件生产线的组成部分、工艺过程和技术重点;分析了该生产线中蕴含的微观物流、信息采集、分布式控制及多智能体的协同过程,总结了PC构件生产线的优点和技术创新突破点,可为大型智能PC构件全自动生产线的研制提供理论基础和技术依据。 Abstract: According to the needs of the concrete factory production, the large scale intelligent automatic PC production line the technological process and technical keys of PC component are introduced, the cooperative process of microscopic logistics, information acquisition, distributed control and multi-agent systems are analyzed, the advantages and technology innovation of PC components production line are summarized, which can provide theoretical basis and technical basis for large scale intelligent automatic production line of PC components.
孙红,孙健,吴玉厚,等.大型智能PC构件自动化生产线简介[J].混凝土与水泥制品,2015(3):45-48. SUN H,SUN J,WU Y H,et al.Introduction of Large Scale Intelligent PC Automatic Production Line[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(3):45-48.
建筑垃圾再生微粉的研究现状
建筑垃圾再生微粉的研究现状
  • 毛新奇1,2,屈文俊1,朱 鹏1
2015年第8期
摘要
引用本文
摘   要:建筑垃圾再生微粉各项性能的研究是推进建筑垃圾资源化的重要基础。根据近年来国内关于再生微粉的主要研究成果,对材料来源、制备工艺、工作性能、力学性能和耐久性能等方面进行了综述,并对相关的影响因素进行了探讨分析。 Abstract: Research on the properties of utilization regeneration of powder for construction waste is the important foundation of resource utilization of construction waste. Based on the recent domestic research on recycled powder, material source, manufacturing process, workability, mechanical properties and the durability are reviewed. Besides, the related influence factors are discussed and analyzed.
毛新奇,屈文俊,朱鹏.建筑垃圾再生微粉的研究现状[J].混凝土与水泥制品,2015(8):89-93. MAO X Q,QU W J,ZHU P.Study Status of Recycled Powder for Construction Waste[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(8):89-93.
再生粗骨料及再生混凝土性能研究进展
再生粗骨料及再生混凝土性能研究进展
  • 甘 福1,周脉席1,3,濮 琦2
2018年第9期
摘要
引用本文
摘   要:结合国内外再生粗骨料混凝土的研究现状,综述了再生粗骨料性能、再生粗骨料混凝土性能、再生混凝土改性方法及改性后的混凝土性能等方面内容,展望了再生粗骨料及再生混凝土未来研究方向。 Abstract: Combining the study of recycled coarse aggregate concrete at home and abroad, the property of recycled coarse aggregate, the performance of recycled coarse aggregate concrete, the modified method of recycled concrete and the performance of modified concrete are reviewed, and the fature research direction on recycled coarse aggregate and recycled concrete is prospected.
甘福,周脉席,濮琦.再生粗骨料及再生混凝土性能研究进展[J].混凝土与水泥制品,2018(9):102-107. GAN F,ZHOU M X,PU Q.Research Progress of Performance of Recycled Coarse Aggregate and Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2018(9):102-107.
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